I started in to the realm of LE work when the 40 S&W was the ruler of the roost for the modern officer. This episode Hany and I talk a little history on our old preferred duty pistols, common calibers and the reason behind them, and our fondness for other obscure semi-auto calibers. This is a little trip down memory lane for two old cops with a lot of history on the semi-auto. So what's your favorite auto caliber?